mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 29
Search took 0.03 seconds.
Search: Posts Made By: phillipsjk
Forum: Marin's Mersenne-aries 2020-06-15, 02:26
Replies: 573
Views: 19,436
Posted By phillipsjk
Found MadPoo's list: ...

Found MadPoo's list:


https://www.mersenneforum.org/showpost.php?p=478948&postcount=1654
Edit: THESE APPEAR TO HAVE BEEN DOUBLE-CHECKED ALREADY.

The forum may not allow you to search for...
Forum: Information & Answers 2020-04-05, 17:28
Replies: 13
Views: 824
Posted By phillipsjk
I my experience, memtest86+ is better at finding...

I my experience, memtest86+ is better at finding memory errors than mprime. It may be due to more comprehensive coverage.


Edit: I never overclock my RAM though.



Glad you got it working.
Forum: Information & Answers 2020-04-05, 13:52
Replies: 13
Views: 824
Posted By phillipsjk
Does your older notebook have less than 4GB of...

Does your older notebook have less than 4GB of RAM?


You may want to try limiting how much RAM is used for testing.


AFAIK, a lot of live CD's try to use compressed swap in-RAM space. I doubt...
Forum: Information & Answers 2020-04-04, 03:25
Replies: 15
Views: 1,688
Posted By phillipsjk
[Main thread Apr 3 00:18] Mersenne number...

[Main thread Apr 3 00:18] Mersenne number primality test program version 29.8
[Main thread Apr 3 00:18] Optimizing for CPU architecture: Core 2, L2 cache size: 4x6 MB
The processor is basically 2...
Forum: Information & Answers 2020-04-03, 22:34
Replies: 15
Views: 1,688
Posted By phillipsjk
What does the FFT size refer to then? ...

What does the FFT size refer to then?



All I know is that I observed a drastic drop in performance.


Edit: Google pointed me here:
Forum: Information & Answers 2020-04-03, 06:43
Replies: 15
Views: 1,688
Posted By phillipsjk
Arrow Update

It appears that the problem was indeed the exponents getting too large for the L2 caches on my dual L5420 system.


The 105XXXxxx exponents had an expected run-time of about 16 months.


I...
Forum: Marin's Mersenne-aries 2020-04-03, 06:29
Replies: 573
Views: 19,436
Posted By phillipsjk
My test exponent will complete in a reasonable...

My test exponent will complete in a reasonable time: even with the sister cores using all the memory bandwidth (P-1 stage 2) -- about 4 months. M105XXXxxx exponents were expected to take 16 months.
...
Forum: Marin's Mersenne-aries 2020-03-29, 19:08
Replies: 573
Views: 19,436
Posted By phillipsjk
Sounds like a bug. This may be vulnerable to a...

Sounds like a bug. This may be vulnerable to a replay attack, since you will have access to the full residues.
Forum: Marin's Mersenne-aries 2020-03-29, 00:34
Replies: 573
Views: 19,436
Posted By phillipsjk
I grabbed: DoubleCheck=84995717...

I grabbed:


DoubleCheck=84995717 (https://www.mersenne.org/report_exponent/?exp_lo=84995717&full=1),73,1

Let's see if it really finishes in 2 months as predicted.

My computer that can't...
Forum: Information & Answers 2020-03-18, 23:45
Replies: 12
Views: 1,391
Posted By phillipsjk
If you have a multi-core CPU you can tell the...

If you have a multi-core CPU you can tell the software to only use less that all of them. This may make your productivity software more responsive.


The effect may be larger on CPUs without a...
Forum: Information & Answers 2020-03-18, 14:31
Replies: 7
Views: 871
Posted By phillipsjk
Do you have a specific number you want to test,...

Do you have a specific number you want to test, or are you expecting to be assigned PRP work?


OK, I think I see what OP was complaining about; no PRP option ('Advanced/Test' appears to be a LL...
Forum: Information & Answers 2020-03-18, 00:04
Replies: 15
Views: 1,688
Posted By phillipsjk
I have a dual Intel Xeon L5420 @ 2.50GHz, and my...

I have a dual Intel Xeon L5420 @ 2.50GHz, and my single-core benchmark numbers are way better than the ones listed on that site:

...
Forum: Information & Answers 2020-03-17, 14:44
Replies: 3
Views: 572
Posted By phillipsjk
OK, I did not realize there was such a...

OK, I did not realize there was such a distinction between Trial Factoring and P-1 factoring.


I suppose the problem with ECM is that it is probabilistic, and only helps the project if I actually...
Forum: Information & Answers 2020-03-17, 06:47
Replies: 15
Views: 1,688
Posted By phillipsjk
If I recall correctly, mprime was consistently...

If I recall correctly, mprime was consistently over 500% CPU usage.


Without mprime (and 2.5Ghz instead of 2.0Ghz):


last pid: 2002; load averages: 0.56, 0.47, 0.41 ...
Forum: Information & Answers 2020-03-17, 06:30
Replies: 3
Views: 572
Posted By phillipsjk
Best use of one fortnite of CPU time?

I moved my assignments from my (old) dual Xeon machine to my quad AMD Bulldozer. They are now expected to complete [within] about a month (at an estimated power cost of $70 (600W, 30 days,...
Forum: PrimeNet 2020-03-05, 16:47
Replies: 4
Views: 434
Posted By phillipsjk
Looks like I will be copying prime.txt and the...

Looks like I will be copying prime.txt and the running 4 instances: mprime is not NUMA aware. I have had problems in the past with cryptocurrency hashers erroring out when accessing "foreign" memory...
Forum: Hardware 2020-03-05, 03:16
Replies: 14
Views: 1,597
Posted By phillipsjk
On a machine I got for "free", disk (and...

On a machine I got for "free", disk (and network?) IO would cause it to fail (forget the exact errors).

Turns out the southbridge chip was faulty. Ended up getting an AM2 board with cheap "high...
Forum: PrimeNet 2020-03-05, 00:11
Replies: 4
Views: 434
Posted By phillipsjk
Prime.txt is explicitly supposed to be copiable...

Prime.txt is explicitly supposed to be copiable from PC to PC (mentioned in the readme.txt).

Edit: I want to hand edit the local.txt because both machines are a NUMA. It is relatively easy to map...
Forum: PrimeNet 2020-03-05, 00:01
Replies: 4
Views: 434
Posted By phillipsjk
I found that the PRP backup files were larger...

I found that the PRP backup files were larger than the available space on my USB stick (around 600MB). I solved that problem by being more selective in the files I copied over:


Only the state...
Forum: PrimeNet 2020-03-04, 21:30
Replies: 4
Views: 434
Posted By phillipsjk
Best practice for migrating work to a new machine?

After the projected (run time) of my assigned primality tests doubled; I decided to move the assignments to my "white elephant" computer for completion.

Looking through the local.txt file I see:
...
Forum: Information & Answers 2020-03-02, 02:00
Replies: 15
Views: 1,688
Posted By phillipsjk
Don't think so. My CPU does not do...

Don't think so. My CPU does not do hyperthreading.

Edit: None of the Intel CPUs I have in use support hyperthreading. (I did try to replace a Pentium D with a Hyperthreaded Pentium 4 (Overclocked)...
Forum: Information & Answers 2020-03-01, 14:40
Replies: 15
Views: 1,688
Posted By phillipsjk
Good to know. Last night: killing the...

Good to know.

Last night: killing the browser (but not the virtual machine) improved performance by 20% (about right for how much CPU it was using). Not sure why that did not happen earlier.
...
Forum: Information & Answers 2020-03-01, 05:09
Replies: 15
Views: 1,688
Posted By phillipsjk
Question I may transfer this work to my "white elephant"...

I may transfer this work to my "white elephant" (quad CPU) AMD machine. I generally can't afford to run it, but it should complete within a month (more efficiently than the current machine).

Is...
Forum: Information & Answers 2020-02-29, 19:02
Replies: 15
Views: 1,688
Posted By phillipsjk
Performance dropped dramatically after update

Hello,

I am running FreeBSD on an old dual-Xeon system. After a software update last month, the run-time on Primality testing went up dramatically. I initially blamed the Web-browser and virtual...
Forum: Software 2019-11-16, 00:44
Replies: 3
Views: 847
Posted By phillipsjk
It is possible that the SSD has buggy firmware. ...

It is possible that the SSD has buggy firmware.


The fstrim command should only tell the SSD to TRIM unallocated space, unless there is a kernel bug.


A work-around may be to disable...
Showing results 1 to 25 of 29

 
All times are UTC. The time now is 13:57.

Fri Jul 3 13:57:01 UTC 2020 up 100 days, 11:30, 1 user, load averages: 2.13, 1.94, 1.65

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.